Study On Delimitation Of Erosion-Prone Areas

Soil and Water Conservation law amended provides that:"except in the mountains, hills, sand, in the other area prone to soil erosion that soil and water conservation plan identified areas to start-up may cause soil erosion projects, production and construction projects should be prepared soil and water conservation programs at the county.above the water administrative department for approval, and in accordance with the approved program of soil and water conservation, soil erosion prevention and control measures taken.". Thus, work to implement the new requirements of the law, practical, accurate and reasonable exposition and delineate "Conservation Planning identified other areas prone to erosion," it is very necessary and urgent. This is both the national and local people’s governments at various levels and water conservation planning and the development of relevant rules and regulations and other practical needs, but also to provide a scientific basis for supervision and management of soil and water conservation are urgently needed.This article is based on data and surveys of Jiangsu Province, based on a combination of "qualitative+quantitative" methods to analyze the main types of erosion-prone land use degree evaluation of regional extent of erosion-prone delineate erosion-prone areas. First, the main use of qualitative analysis, explicit important ecological function areas, sand plains area, urban districts, development zones, industrial and mining areas prone to erosion degree; Then, township administrative unit as the basic evaluation unit, the soil erosion factors identified based on the degree to build erosion-prone evaluation index system, using AHP to determine index weight, and through the "multi-index comprehensive weighting" Building a quantitative evaluation of the degree of soil erosion-prone model, quantitative evaluation of the basic evaluation unit erosion prone hair degree;, secondly, according to the degree of erosion-prone soil erosion prone areas delineated; Finally, SuYu District as an example the degree of erosion-prone areas and to delineate SuYu erosion-prone areas. This formed the main results are as follows:(1) Identified the important ecological function areas, sand plains area, urban areas, development zones, industrial and mining areas as erosion-prone areas.(2) Constructs Degree of erosion-prone quantitative evaluation model.(3) Delineated soil erosion in Suqian Suyu District prone areasThe area of Suyu District erosion-prone is about455.29km2, accounting for36.25%of the total area Suyu, including:①Suyu District drinking water source protection areas, drinking water source protection areas in the canal, Luoma drinking water source protection areas, Luoma (Economic Development District Waterworks) drinking water source protection areas, abandoned Yellow River (Suyu) important wetlands, Luoma (Suyu) important wetlands, the Jinghang Grand Canal (Suyu) water channel maintenance areas and other important ecological function protected areas, removal of duplicate parts, is about30km2;②Plains area of Guanmiao zhen, Caiji zhen, wangguanji zhen, zaohe zhen,huangdunzhen, is about50km2.③The total area of Shun Town, Luji Zhen, Igashira township,Cao Jixiang town, and town built area of Zaohe town, Dragon Town, Daxing Town, Yanghua Town,Caiji Town, Huangdun Town, Xinzhuang zhen,ect,375.29km2, accounting for30%of the total area.